SSTrack: An Object Tracking Algorithm Based on Spatial Scale Attention

Abstract

The traditional Siamese object tracking algorithm uses a convolutional neural network as the backbone and has achieved good results in improving tracking precision. However, due to the lack of global information and the use of spatial and scale information, the accuracy and speed of such tracking algorithms still need to be improved in complex environments such as rapid motion and illumination variation. In response to the above problems, we propose SSTrack, an object tracking algorithm based on spatial scale attention. We use dilated convolution branch and covariance pooling to build a spatial scale attention module, which can extract the spatial and scale information of the target object. By embedding the spatial scale attention module into Swin Transformer as the backbone, the ability to extract local detailed information has been enhanced, and the success rate and precision of tracking have been improved. At the same time, to reduce the computational complexity of self-attention, Exemplar Transformer is applied to the encoder structure. SSTrack achieved 71.5% average overlap (AO), 86.7% normalized precision (NP), and 68.4% area under curve (AUC) scores on the GOT-10k, TrackingNet, and LaSOT. The tracking speed reached 28fps, which can meet the need for real-time object tracking.

Keywords

• object tracking
• Siamese network
• spatial scale attention
• swin transformer
• potisional encoding